30 August 1993 Suppression of coherence effects in the measurement of mm wave absorption in the JET plasma
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Proceedings Volume 2104, 18th International Conference on Infrared and Millimeter Waves; 21043K (1993) https://doi.org/10.1117/12.2298560
Event: 18th International Conference on Infrared and Millimeter Waves, 1993, Colchester, United Kingdom
Abstract
The pumped divertor(1) is a major upgrade for the JET tokamak. Its purpose is to control the influx of impurities intothe plasma and minimize the heat loading on the target tiles. The plasma parameters in the divertor region, low electrontemperature, Te, (10-100 eV) and high electron density, ne, (-1020 m-3) are very different from those of the bulk plasma.Electron cyclotron emission (ECE) cannot be used to measure local Te because of the resulting low optical depth, T.However low t makes the measurement of electron cyclotron absorption (ECA) feasible(2)(3). The absorption is directlyrelated to the local neTe product.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. R. Harvey, A. R. Harvey, "Suppression of coherence effects in the measurement of mm wave absorption in the JET plasma", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21043K (30 August 1993); doi: 10.1117/12.2298560; https://doi.org/10.1117/12.2298560
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